WO2012035065A2

WO2012035065A2 - Cosmetic composition comprising at least one volatile linear alkane with a fatty ester or alcohol and at least one plant oil

Info

Publication number: WO2012035065A2
Application number: PCT/EP2011/065941
Authority: WO
Inventors: Cécile Bebot; Thomas Fondin
Original assignee: L'oreal
Priority date: 2010-09-14
Filing date: 2011-09-14
Publication date: 2012-03-22
Also published as: FR2965482B1; WO2012035065A3; FR2965482A1

Abstract

The present invention relates to a cosmetic composition comprising, in a cosmetically acceptable medium: - one or more volatile linear alkanes, - one or more plant oils, - one or more C8 to C50 fatty ester(s) or alcohol(s), the esters being different from the plant oils. The invention also relates to the use of this composition for the cosmetic treatment of keratin materials, preferably keratin fibres such as the hair, and to a cosmetic process for treating keratin materials using the said composition.

Description

Cosmetic composition comprising at least one volatile linear alkane with a fatty ester or alcohol and at least one plant oil

The present invention relates to a cosmetic composition compri sing one or more volatile linear alkane(s), one or more fatty alcohol(s) or ester(s) and one or more pl ant oil (s), to its use for the cosmetic treatment of keratin material s, preferably keratin fibres such as the hair, and to a cosmetic process for treating keratin material s using the said composition.

In the field of hair treatment, the use of volatile solvents i s known in rinse-out or leave-in haircare products.

These volatile solvents, which are generally liquid fatty esters, hydrocarbon-based oil s of i sododecane or i sohexadecane type, and/or silicone oil s, may especially give ri se to problem s in terms of a greasy feel, lack of sheen, and stiff, hard hair.

There i s thus still a need to obtain compositions that can avoi d the drawbacks mentioned above.

The Applicant has now di scovered, surpri singly and unexpectedly, that the combination of one or more volatile linear alkanes, one or more fatty alcohol(s) or ester(s) and one or more pl ant oil s makes it possible to avoid the drawbacks mentioned above.

In particular, the composition according to the invention can afford hair that i s smoother, uniform and/or more supple, at the time of rinsing. On wet hair, hair that i s easier to di sentangle or more tonic and/or whose roots are more lifted (at the roots, the hairs are not flattened onto the scalp, but form an angle, which gives volume) i s obtained. Hair treated with the compositi on according to the invention dries rapidly . In addition, the dry hair is more supple and/or has a smoother feel and i s shinier. Thus, one subj ect of the invention is a cosmetic composition compri sing, in a cosmetically acceptable medium :

- one or more volatile linear alkanes,

- one or more plant oil s,

- one or more C8 to C50 fatty ester(s) or alcohol(s),

the esters being different from the plant oil s.

A subj ect of the invention is al so the use of a composition according to the invention for the cosmetic treatment of keratin material s, preferably keratin fibres such as the hair, especially as a rinse-out haircare product.

Another subj ect of the invention i s a cosmetic process for treating keratin material s, preferably keratin fibres such as the hair, using the said composition.

The term "one or more volatile linear alkane(s)" means, without preference, "one or more volatile linear alkane oil(s)" .

Volatile linear alkanes

A volatile linear alkane that is suitable for use in the invention i s liquid at room temperature (about 25 ° C) and at atmospheric pressure ( 101 325 Pa or 760 mmHg) .

The term "volatile linear alkane that i s suitable for use in the invention" means a linear alkane that can evaporate on contact with the skin in less than one hour, at room temperature (25 °C) and atmospheric pressure ( 101 325 Pa), which i s liquid at room temperature, especi ally having an evaporation rate ranging from 0.0 1 to 1 5 mg/cm²/minute, at room temperature (25 ° C) and atmospheric pressure ( 101 325 Pa) . Preferably, the volatile linear alkane(s) that are suitable for use in the invention have an evaporation rate ranging from 0.01 to 3 .5 mg/cm²/minute and better still from 0.01 to 1 .5 mg/cm²/minute, at room temperature (25 °C) and atmospheric pressure ( 10 1 325 Pa) .

More preferably, the volatile linear alkane(s) that are suitable for use in the invention have an evaporation rate ranging from 0.01 to 0.8 mg/cm²/minute, preferentially from 0.01 to 0.3 mg/cm²/minute and even more preferentially from 0.01 to 0. 12 mg/cm²/minute, at room temperature (25 °C) and atmospheric pressure ( 10 1 325 Pa) .

The evaporation rate of a volatile alkane in accordance with the invention (and more generally of a volatile solvent) may especially be evaluated by means of the protocol described in WO 06/01 3 413 , and more particularly by means of the protocol describ ed below.

1 5 g of volatile hydrocarbon-based solvent are placed in a crystallizing di sh (di ameter: 7 cm) placed on a balance that i s in a chamber of ab out 0.3 m³ with regulated temperature (25 °C) and hygrometry (50% relative humidity).

The volatile hydrocarbon-based solvent i s allowed to evaporate freely, without stirring it, while providing ventilation by means of a fan (Papst-Motoren, reference 8550 N, rotating at 2700 rpm) pl aced in a vertical position above the crystallizing di sh containing the volatile hydrocarbon-based solvent, the blades being directed towards the crystallizing di sh, 20 cm away from the bottom of the di sh.

The mass of volatile hydrocarbon-based solvent remaining in the crystallizing di sh i s measured at regular time interval s.

The evaporation profile of the solvent i s then obtained by plotting the curve of the amount of product evaporated (in mg/cm²) as a function of time (in minutes) . The evaporation rate i s then calculated, which corresponds to the tangent to the origin of the curve obtained. The evaporation rates are expressed in mg of volatile solvent evaporated per unit area (cm²) and per unit of time (minutes).

According to one preferred embodiment, the volatile linear alkane(s) that are suitable for use in the invention have a non-zero vapour pressure (al so known as the saturating vapour pressure), at room temperature, in particular a vapour pressure ranging from 0.3 Pa to 6000 Pa.

Preferably, the volatile linear alkane(s) that are suitable for use in the invention have a vapour pressure ranging from 0.3 to 2000 Pa and better still from 0.3 to 1 000 Pa, at room temperature (25 °C) .

More preferably, the volatile linear alkane(s) that are suitabl e for use in the invention have a vapour pressure ranging from 0.4 to 600 Pa, preferentially from 1 to 200 Pa and even more preferentially from 3 to 60 Pa, at room temperature (25 °C) .

According to one embodiment, a volatile linear alkane that i s suitable for use in the invention may have a flash point that i s in the range from 30 to 120°C and more particularly from 40 to 100°C . The flash point i s in particular measured according to standard ISO 3679.

According to one embodiment, the volatile linear alkane(s) that are suitable for use in the invention may be linear alkanes compri sing from 7 to 1 5 carbon atoms, preferably from 8 to 14 carb on atoms and better still from 9 to 14 carbon atoms.

More preferably, the volatile linear alkane(s) that are suitabl e for use in the invention compri se from 10 to 14 carbon atoms and even more preferentially from 1 1 to 14 carbon atoms. The volatile linear alkane(s) that are suitable for use in the invention may advantageously be of plant origin.

Preferably, the volatile linear alkane or the mixture of volatile linear alkanes present in the composition according to the invention comprises at least one ¹⁴C (carbon-14) carbon isotope. In particular, the ¹⁴C isotope may be present in a ¹⁴C/¹²C isotope ratio (by number of isotopes) of greater than or equal to 1 ^χ 10^"16, preferably greater than or equal to lxlO^"15, more preferably greater than or equal to 7.5><10^"14 and better still greater than or equal to 1.5^χ10^"13. Preferably, the ¹⁴C/¹²C isotope ratio ranges from 6^χ10^"13 to 1.2^χ10^"12.

The amount of ¹⁴C isotopes in the volatile linear alkane or the mixture of volatile linear alkanes may be determined via methods known to those skilled in the art such as the Libby compacting method, liquid scintillation spectrometry or accelerator mass spectrometry.

Such an alkane or mixture of alkanes may be obtained, directly or in several steps, from a plant raw material, such as an oil, a butter, a wax, etc.

As examples of alkanes that are suitable for use in the invention, mention may be made of the alkanes described in patent applications WO 2007/068 371 and WO 2008/155 059. These alkanes are obtained from fatty alcohols, which are themselves obtained from coconut oil or palm oil.

As examples of linear alkanes that are suitable for use in the invention, mention may be made of n-heptane (C7), n-octane (C8), n- nonane (C9), n-decane (CIO), n-undecane (Cll), n-dodecane (C12), n- tridecane (C13) and n-tetradecane (C14), and mixtures thereof. According to one particular embodiment, the volatile linear alkane is chosen from n-nonane, n-undecane, n-dodecane, n-tridecane and n-tetradecane, and mixtures thereof, and better still from n-undecane and n-tridecane, and mixtures thereof.

According to one preferred embodiment, mention may be made of mixtures of n-undecane (Cll) and of n-tridecane (C13) obtained especially in Examples 1 and 2 of patent application WO 2008/155059.

Mention may also be made of n-dodecane (C12) and n- tetradecane (C14) sold, respectively, under the references Parafol 12-97 and Parafol 14-97 by the company Sasol, and also mixtures thereof.

One embodiment consists in using only one volatile linear alkane.

Alternatively, a mixture of at least two different volatile linear alkanes, differing from each other by a carbon number n of at least 1, in particular differing from each other by a carbon number of 1 or 2, may be used.

According to one embodiment, a mixture of at least two different volatile linear alkanes comprising from 10 to 14 carbon atoms and differing from each other by a carbon number of at least 1, is used. Examples that may especially be mentioned include mixtures of ClO/Cll, C11/C12 or C12/C13 volatile linear alkanes.

According to another embodiment, a mixture of at least two different volatile linear alkanes comprising from 10 to 14 carbon atoms and differing from each other by a carbon number of at least 2 is used. Examples that may especially be mentioned include mixtures of C10/C12 or C12/C14 volatile linear alkanes, for an even carbon number n and the C11/C13 mixture for an odd carbon number n.

According to one preferred embodiment, a mixture of at least two different volatile linear alkanes comprising from 10 to 14 carbon atoms and differing from each other by a carbon number of at least 2, and in particular a mixture of C 1 1 /C 1 3 volatile linear alkanes or a mixture of C 12/C 14 volatile linear alkanes, i s used. Advantageously, a mixture of n-undecane and n-tridecane i s preferably used.

Other mixtures combining more than two volatile linear alkanes according to the invention, for instance a mixture of at least three different volatile linear alkanes compri sing from 7 to 1 5 carbon atoms and differing from each other by a carbon number of at least 1 , may be used in the invention.

In the case of mixtures of two vol atile linear alkanes, the said two volatile linear alkanes preferably represent more than 95% and better still more than 99% by weight of the mixture.

According to one particular mode of the invention, in a mixture of volatile linear alkanes, the volatile linear alkane having the smaller carbon number i s predominant in the mixture.

According to another mode of the invention, a mixture of volatile linear alkanes in which the volatile linear alkane having the larger carbon number i s predominant in the mixture i s used.

As examples of mixtures that are suitable for use in the invention, mention may be made especially of the following mixtures :

• from 50% to 90% by weight, preferably from 55 % to 80% by weight and more preferentially from 60% to 75% by weight of Cn volatile linear alkane with n ranging from 7 to 1 5 ,

• from 10% to 50% by weight, preferably from 20% to 45% by weight and preferably from 24% to 40% by weight of Cn+x liquid volatile linear alkane with x greater than or equal to 1 , preferably x = 1 or x = 2, with n+x between 8 and 14,

relative to the total weight of alkanes in the said mixture. In particular, the said mixture of volatile linear alkanes may al so contain :

• less than 2% by weight and preferably le ss than 1 % by weight of branched hydrocarbons,

• and/or less than 2% by weight and preferably less than 1 % by weight of aromatic hydrocarbons,

• and/or less than 2% by weight, preferably less than 1 % by weight and preferentially less than 0. 1 % by weight of unsaturated hydrocarbons,

the said percentages b eing expressed relative to the total weight of the mixture.

More particularly, the volatile linear alkanes that are suitable for use in the invention may be used in the form of an n-undecane / n-tridecane mixture.

In particular, use will be made of a mixture of volatile linear alkanes comprising:

• from 55 % to 80% by weight and preferably from 60% to 75% by weight of C l l volatile linear alkane (n-undecane) and

• from 20% to 45 % by weight and preferably from 24% to 40% by weight of C 13 volatile linear alkane (n-tridecane),

relative to the total weight of alkanes in the said mixture.

According to one particular embodiment, the mixture of alkanes i s an n-undecane/n-tridecane mixture . In particular, such a mixture may be obtained according to Example 1 or Example 2 of patent application WO 2008/ 1 55 059. The use of such a mixture gives the treated keratin fibres particularly advantageous cosmetic properties, especially in terms of suppleness and volume.

According to another particular embodiment, the n-dodecane sold under the reference Parafol 12-97 by Sasol is used. According to another particular embodiment, the n-tetradecane sold under the reference Parafol 14-97 by Sasol is used.

According to yet another emb odiment, a mixture of n-dodecane and n-tetradecane i s used, preferably in an 85/ 1 5 ratio, such as the mixture sold under the name Vegelight 12 14 by the company Biosynthis .

The composition of the invention preferably compri ses from 0.5% to 98% by weight of volatile linear alkane(s), in particular from 10%) to 95% by weight, more particularly from 60%> to 95 % by weight and better still from 75% to 95% by weight of volatile linear alkane(s), relative to the total weight of the composition.

The composition of the invention compri ses fatty alcohol or ester which can be liquid or not.

Liquid fatty alcohol or ester

The term " liquid fatty alcohol " means a non-glycerolated and non-oxyalkylenated fatty alcohol which i s liquid at standard temperature (25 °C) and at atmospheric pressure (760 mmHg; i . e. 1 .013 x 10^s Pa) .

Preferably, the liquid fatty alcohols of the invention comprise from 8 to 30 carbon atoms.

The liquid fatty alcohols of the invention may be saturated or unsaturated.

The saturated liquid fatty alcohols are preferably branched. They may optionally compri se in their structure at least one aromatic or non-aromatic ring. They are preferably acyclic.

More particularly, the liquid saturated fatty alcohol s of the invention are chosen from octyldodecanol, iso stearyl alcohol and 2-hexyldecanol. Octyldodecanol is mo st particularly preferred.

The liquid unsaturated fatty alcohol s have in their structure at least one doubl e or triple bond. Preferably, the fatty alcohols of the invention bear in their structure one or more double bonds. When several double bonds are present, there are preferably 2 or 3 of them, and they may be conj ugated or non-conj ugated.

These unsaturated fatty alcohol s may be linear or branched.

They may optionally compri se in their structure at least one aromatic or non-aromatic ring. They are preferably acyclic.

More particularly, the liquid unsaturated fatty alcohols of the invention are selected from oleic (or oleyl) al cohol, linoleic (or linoleyl) alcohol, linolenic (or linolenyl) alcohol and undecylenyl alcohol.

Oleyl alcohol is mo st particularly preferred.

The term " liquid fatty ester" means an ester that i s derived from a fatty acid and/or from a fatty alcohol and that is liquid at ordinary temperature (25 °C) and at atmospheric pressure (760 mmHg; i . e . 1 .013 x 10^s Pa) .

These esters are different from the plant oil s.

The esters are preferably liquid esters of saturated or unsaturated, linear or branched, C 1 -C24 aliphatic monoacids or polyacids and of saturated or unsaturated, linear or branched, C 1 -C26 aliphatic monoalcohol s or polyalcohols.

For the esters of monoalcohol s, preferably at least one from among the alcohol and the acid from which the esters of the invention are obtained i s branched.

Among the monoesters of monoacids and of monoalcohol s, mention may be made of ethyl palmitate, i sopropyl palmitate, alkyl myri states such as i sopropyl myristate or ethyl myri state, i socetyl stearate, 2-ethylhexyl isononanoate, isodecyl neopentanoate and isostearyl neopentanoate.

Esters of C4-C22 dicarboxylic or tricarboxylic acids and of C1-C22 alcohols and esters of mono-, di- or tricarboxylic acids and of C4-C26 non-sugar di-, tri-, tetra- or pentahydroxy alcohols may also be used.

Mention may be made especially of: diethyl sebacate; diisopropyl sebacate; bis(2-ethylhexyl) sebacate; diisopropyl adipate; di-n-propyl adipate; dioctyl adipate; bis(2-ethylhexyl) adipate; diisostearyl adipate; bis(2-ethylhexyl) maleate; triisopropyl citrate; triisocetyl citrate; triisostearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate; neopentyl glycol diheptanoate; diethylene glycol diisononanoate.

The composition may also comprise, as liquid fatty ester, esters and diesters of sugars of C8-C30 and preferably C12-C22 fatty acids. It is recalled that the term "sugar" means oxygen-bearing hydrocarbon-based compounds containing several alcohol functions, with or without aldehyde or ketone functions, and which comprise at least 4 carbon atoms. These sugars may be monosaccharides, oligosaccharides or polysaccharides.

Examples of suitable sugars that may be mentioned include sucrose (or saccharose), glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose and lactose, and derivatives thereof, especially alkyl derivatives, such as methyl derivatives, for instance methylglucose.

The sugar esters of fatty acids may be selected especially from the group comprising the esters or mixtures of esters of sugars described previously and of linear or branched, saturated or unsaturated C6-C30 and preferably C12-C22 fatty acids. If they are unsaturated, these compounds may comprise one to three conj ugated or unconj ugated carbon-carbon double bonds.

The esters according to thi s variant may al so be selected from monoesters, diesters, triesters, tetraesters and polyesters, and mixtures thereof.

These esters may be, for example, oleates, laurates, palmitates, myri states, behenates, cocoates, stearates, linoleates, linolenates, caprates and arachidonates, or mixtures thereof such as, especially, oleopalmitate, oleostearate and palmitostearate mixed esters .

More particularly, use i s made of monoesters and diesters and especially sucrose, glucose or methylglucose monooleate or dioleate, stearate, behenate, oleopalmitate, linoleate, linolenate or oleostearate.

An example that may be mentioned i s the product sold under the name Glucate® DO by the company Amerchol, which i s a methylglucose dioleate .

Finally, synthetic esters of mono-, di- or triacids with glycerol may al so be used.

As synthetic triglycerides that may b e used in the composition of the invention as liquid fatty esters, examples that may be mentioned include capryli c/capric acid triglycerides, for instance those sold by the company Stearineries Duboi s or those sold under the names Miglyol® 8 10, 8 12 and 8 1 8 by the company Dynamit Nobel. The C 8 to C50 liquid fatty alcohol(s) or ester(s) are preferably present in the composition according to the invention in an amount ranging from 0.05 % to 20% by weight, more particularly in an amount ranging from 0. 1 % to 10% by weight and better still in an amount ranging from 0.2% to 5% by weight relative to the total weight of the composition.

The fatty alcohol or ester may be non-liquid at room temperature and at atmospheric pressure.

The term "non-liquid" preferably means a solid compound or a compound that has a vi scosity of greater than 2 Pa. s at a temperature of 25 °C and at a shear rate of 1 s- 1 .

The non-liquid fatty alcohol s that are suitable for use in the invention are more particularly chosen from saturated or unsaturated, linear or branched alcohols compri sing from 8 to 30 carbon atoms . Mention may be made, for example, of cetyl alcohol, stearyl alcohol and a mixture thereof (cetyl stearyl alcohol), myri styl alcohol.

As regards the non-liquid esters of fatty acids and/or of fatty alcohols, mention may be made especially of solid esters derived from C9-C26 fatty acids and from C9-C26 fatty alcohols.

Among these esters, mention may be made of octyldodecyl behenate; i socetyl behenate; cetyl l actate; stearyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; myri styl stearate; octyl palmitate; octyl pelargonate; octyl stearate; alkyl myri states such as cetyl, myristyl or stearyl myri state; hexyl stearate.

Still within the context of this variant, esters of C4-C22 dicarboxylic or tricarboxylic acids and of C 1 -C22 alcohol s and esters of mono-, di- or tricarboxylic acids and of C2-C26 di-, tri-, tetra- or pentahydroxy alcohols may al so be used.

Mention may be made especially of: diethyl sebacate; dii sopropyl sebacate; dii sopropyl adipate; di-n-propyl adipate; dioctyl adipate; dioctyl maleate. Among all the additional esters mentioned above, it is preferred to use myristyl, cetyl or stearyl palmitates, alkyl myristates such as cetyl myristate, and stearyl or myristyl myristate. Plant oil

The composition according to the invention contains one or more plant oils.

The term "oil" means any nonionic lipophilic compound that is insoluble in water and liquid at room temperature (25°C) and at atmospheric pressure (760 mmHg, i.e. 1.013 x 10⁵ Pa). For the purposes of the present invention, the term "water-insoluble" refers to a compound whose solubility at spontaneous pH in water at 25°C and at atmospheric pressure is less than 1% and preferably less than 0.5% by weight. Oils are soluble in organic solvents under the same temperature and pressure conditions, for instance chloroform, ethanol or benzene. Furthermore, oils are liquid at ordinary temperature (25°C) and at atmospheric pressure. Oils preferably have a melting point of less than 5°C and a viscosity of less than 500 cPs at 25°C at a shear rate of 1 s^"1.

In particular, the term "plant oil" means a non-oxyalkylenated oil as defined above, extracted from a species belonging to the plant kingdom.

As examples of plant oils that may be used in the compositions of the invention, mention may be made of:

- sweet almond oil,

- argan oil,

- avocado oil,

- groundnut oil,

- camellia oil, safflower oil,

beauty-leaf oil,

rapeseed oil,

coconut oil,

coriander oil,

marrow oil,

wheatgerm oil,

j oj oba oil or liquid j oj oba linseed oil,

macadamia oil,

corn germ oil,

hazelnut oil,

walnut oil,

vernonia oil,

apricot kernel oil, olive oil,

evening primrose oil, palm oil,

passion flower oil, grapeseed oil,

rose oil,

castor oil,

rye oil,

sesame oil,

rice bran oil,

camellina oil,

soybean oil,

sunflower oil,

pracaxi oil, - babassu oil,

- mongongo oil,

- marula oil,

- arara oil,

- shea butter oil,

- Brazil nut oil.

The plant oils according to the invention generally have not undergone any chemical transformation after extraction.

Among the plant oils mentioned above, olive oil, argan oil, avocado oil, rapeseed oil, jojoba oil or liquid jojoba wax, soybean oil, sunflower oil, sweet almond oil and camellina oil are preferably used, and more preferably avocado oil, sweet almond oil, camellina oil, jojoba oil or liquid jojoba wax.

Preferably, the plant oil(s) are present in the composition in an amount ranging from 0.1% to 30%, more preferably in an amount ranging from 0.2% to 20%, and better still in an amount ranging from 0.5% to 15%) by weight, relative to the total weight of the composition.

Cosmetic Medium

The composition according to the invention may comprise water, a mixture of one or more organic solvents or a mixture of water and of one or more organic solvents, the organic solvents being, besides the volatile linear alkanes, preferably chosen from C1-C4 lower alcohols, such as ethanol, isopropanol, tert-butanol or n- butanol; polyols such as glycerol, propylene glycol and polyethylene glycols; branched liquid alkanes such as isohexadecane. and mixtures thereof. In one variant of the invention, the compositions used according to the invention contain less than 10% by weight of water and are preferably anhydrous, i . e. they contain no added water, the only water present being the water of crystallization of the starting material s .

The composition according to the invention may al so comprise one or more standard additives that are well known in the art, other than the compounds defined previously . As examples of additives that may b e used according to the invention, mention may be made of ioni c or nonioni c associative or non-associative polymers and in particular cationic polymers, liquid or solid fatty sub stances other than the plant oil s and the liquid fatty esters or alcohol s, silicones, silanes, proteins, vitamins, reducing agents, plasticizers, softeners, antifoams, moi sturizers, pigments, clays, mineral fillers, UV- screening agents, mineral colloids, peptizers, solubilizers, fragrances, preserving agents, nacreous agents, propellants and mineral or organic thickeners.

A person skilled in the art will take care to select the optional additive(s) and the amount thereof such that they do not harm the properties of the compositions of the present invention.

The additive(s) are generally present in the composition according to the invention in an amount ranging from 0 to 20% by weight relative to the total weight of the composition.

The compositions according to the invention may be in the form of a rinse-out or leave-in care composition, and may be in the form of a more or less thickened lotion, a cream, a gel or an emul sion.

Another subj ect of the invention i s the use of the cosmetic composition as described above for the cosmetic treatment of keratin material s, preferably keratin fibres such as the hair, and especially as a rinse-out haircare product. The invention al so relates to a cosmetic process for treating keratin material s, preferably keratin fibres such as the hair, which compri ses the application of an effective amount of a cosmetic composition as described above to the said material s, and optional rinsing of the said composition after an optional leave-on time.

When the composition according to the invention i s applied in the form of a lotion or a cream, it i s optionally left to stand on the hair for about 0.5 to 5 minutes, and i s then optionally rinsed out with water.

The examples below are given as illustrations of the present invention.

In the examples that follow, all the amounts are indicated as weight percentages of product in unmodified form relative to the total weight of the composition, unless otherwi se indicated.

Example

Commercial reference : Amount

Sweet almon d oil obtained by 7 cold p ressing

Fragran ce 1

Caprylic/capric acid

MYRITOL 318(COGNIS)° 15 triglycerides (60/40)

i Unstabilized refined camellin a

oil (15/22/31/13 REFINED GOLD OF PLEASURE 7 ; oleic/lin oleic/lin olenic/eicosenoic OIL(AARHUSKARLSHAMN)

acid triglycerides)

2-Octyldodecanol EUTANOL G(COGNIS)L 15

Undecane/tridecane CETIOL UT(COGNIS) 55

Thi s composition i s applied to dark chestnut-brown hair. After drying, the hair i s shiny, supple and well-managed.

Claims

1 . Cosmetic composition comprising :

- one or more volatile linear alkanes,

- one or more plant oil s,

- one or more C8 to C50 fatty ester(s) or alcohol(s),

the esters being different from the plant oil s.

2. Cosmetic composition according to the preceding claim, characterized in that the volatile linear alkane(s) are linear alkanes compri sing from 7 to 1 5 carbon atoms.

3 . Cosmetic composition according to Claim 1 or 2, characterized in that the volatile linear alkane(s) are chosen from n- heptane (C7), n-octane (C8), n-nonane (C9), n-decane (C I O), n- undecane (C l l ), n-dodecane (C 12), n-tridecane (C 13 ) and n- tetradecane (C 14), and mixtures thereof.

4. Cosmetic composition according to the preceding claim, characterized in that the volatile linear alkane(s) are chosen from n- nonane, n-undecane, n-dodecane, n-tridecane and n-tetradecane, and mixtures thereof.

5. Cosmetic composition according to the preceding claim, characterized in that the volatile linear alkanes are chosen from n- undecane/n-tridecane mixtures.

6. Cosmetic composition according to any one of the preceding cl aims, characterized in that the volatile linear alkane(s) are of pl ant origin.

7. Cosmetic composition according to any one of the preceding claims, characterized in that the volatile linear alkane(s) are present in a content ranging from 0.5% to 98% by weight, in particul ar from 10%) to 95% by weight, more particularly from 60%> to 95% and better still from 75% to 95% by weight of volatile linear alkane(s), relative to the total weight of the composition.

8. Cosmetic composition according to any one of the preceding claims, characterized in that the C 8 to C 50 liquid fatty alcohol(s) are saturated and are preferably chosen from octyldodecanol, i so stearyl alcohol and 2-hexyldecanol.

9. Cosmetic composition according to the preceding claim, characterized in that the C8 to C 50 liquid fatty alcohol(s) are unsaturated and are preferably chosen from oleyl alcohol, linoleyl alcohol, linolenyl alcohol and undecylenyl alcohol.

10. Cosmetic composition according to any one of the preceding claims, characterized in that the C 8 to C 50 liquid ester(s) are chosen from liquid esters of saturated or unsaturated, linear or branched C 1 -C24 aliphatic mono- or polyacids and of saturated or unsaturated, linear or branched C 1 -C26 aliphatic mono- or polyalcohols.

1 1 . Cosmetic composition according to any one of Claims 8 to

10, characterized in that the C 8 to C50 liquid ester(s) are chosen from monoesters of monoacids and of monoalcohols such as ethyl palmitate, i sopropyl palmitate, alkyl myri states such as i sopropyl myri state or ethyl myri state, i socetyl stearate, 2-ethylhexyl i sononanoate, isodecyl neopentanoate and i sostearyl neopentanoate, esters of C4-C22 di- or tricarboxylic acids and of C 1 -C22 alcohol s, and esters of mono-, di- or tricarboxylic acids and of C4-C26 non- sugar di-, tri-, tetra- or pentahydroxy alcohol s, such as diethyl sebacate; dii sopropyl sebacate; bi s(2-ethylhexyl) sebacate; dii sopropyl adipate; di-n-propyl adipate; dioctyl adipate; bi s(2-ethylhexyl) adipate; dii so stearyl adipate; bi s(2-ethylhexyl) maleate; trii sopropyl citrate; trii socetyl citrate; trii so stearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate; neopentyl glycol diheptanoate; diethylene glycol dii sononanoate,

sugar monoesters and diesters of C 8-C30 and preferably C 12-

C22 fatty acids such as sucrose, glucose or methylglucose mono- or di- oleate, stearate, b ehenate, oleopalmitate, linoleate, linolenate or oleostearate,

synthetic esters of mono-, di- or triacids with glycerol, such as caprylic/capric acid triglycerides .

12. Cosmetic composition according to any one of the preceding claims, characterized in that the C 8 to C50 liquid fatty alcohol(s) or ester(s) are present in the composition according to the invention in an amount ranging from 0.05% to 20% by weight, more particularly in an amount ranging from 0. 1 % to 10% by weight and better still in an amount ranging from 0.2% to 5% by weight relative to the total weight of the composition.

13 . Cosmetic composition according to any one of the preceding claims, characterized in that the plant oil(s) are chosen from:

- sweet almond oil,

- argan oil,

- avocado oil, groundnut oil,

camellia oil,

safflower oil,

beauty-leaf oil,

rapeseed oil,

coconut oil,

coriander oil,

marrow oil,

wheatgerm oil,

j oj oba oil or liquid j oj oba linseed oil,

macadamia oil,

corn germ oil,

hazelnut oil,

walnut oil,

vernonia oil,

apricot kernel oil, olive oil,

evening primrose oil, palm oil,

passion flower oil, grapeseed oil,

rose oil,

castor oil,

rye oil,

sesame oil,

rice bran oil,

camellina oil,

soybean oil,

sunflower oil, - pracaxi oil,

- babassu oil,

- mongongo oil,

- marula oil,

- arara oil,

- shea butter oil,

- Brazil nut oil, and preferably from olive oil, argan oil, avocado oil, rapeseed oil, sweet almond oil, camellina oil, jojoba oil or liquid jojoba wax, soybean oil and sunflower oil, and more preferably avocado oil, sweet almond oil, camellina oil, jojoba oil or liquid jojoba wax.

14. Cosmetic composition according to any one of the preceding claims, characterized in that the plant oil(s) are present in a content ranging from 0.1% to 30%, more preferentially in an amount ranging from 0.2% to 20% and better still in an amount ranging from 0.5% to 15%) by weight relative to the total weight of the composition.

15. Use of a composition according to any one of the preceding claims, for the cosmetic treatment of keratin materials, preferably keratin fibres such as the hair, especially as a rinse-out haircare product.